Flexible ureteroscopy is a recent procedure to treat renal stone. Extracorporeal shockwave lithotripsy was the gold standard treatment for calculi between 5 and 20 mm. In literature, the two procedures are available to treat these stones with a good stone free rate. There is no prospective randomized study comparing these two treatments. Our study will define with a good level of evidence which technique is the best with regard to the stone free rate, secondary procedure rate and adverse effect.

Rate of stone free patient or patient with residual fragment ≤ 3 mm, 3 months after the treatment evaluated, will be compare. This outcome is measured with a tomodensitometry and compares with pre treatment exams.

The lithotriptor is use with 1,1 Hz frequency and stop when patient get 1000 joules of energy or if there is a problem with tolerance of this treatment or if stone is broken

Active Comparator: Flexible ureteroscopy

intra renal retrograde surgery with or without laser and stone extraction

Procedure: flexible ureteroscopy

Flexible ureteroscopy will be use for 120 min max to treat renal stone. Laser, access sheath, baskets can be use to perform the technique.

Eligibility

Ages Eligible for Study:

18 Years and older (Adult, Senior)

Genders Eligible for Study:

Both

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Patient with 5 to 20 mm renal stone

Age ≥ 18 years old

Patient agreement signed

BMI < 35

Contraception

Exclusion Criteria:

Pregnancy

Severe musculoskeletal deformities

Renal artery or aorta aneurysm

Pacemaker

Anesthesia contra indication

Psychiatric trouble or law protection

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01604304